>> homeland security secretary, janet napolitano testified today at a senate hearing about terrorism and national security. here is part of that hearing was her opening statement. first, we'll hear from senator joe lieberman of susan collins. >> obviously we hold this hearing today, still mourning the deaths of the american ambassador to libya, chris stevens and three other state department personnel. still speaking personally, infuriated by those attacks that resulted from a movement against what i too believe a terrorist act against our conflict in benghazi. on the 11th anniversary of the attacks of september 11. these attacks do many things, but they remind us i think first of the bravery and commitment of government officials who serve in countries around the world, supporting the struggles of people in those countries to live free. and by doing so, we are to improve our own national security. the attack and libya also reminds us that even though the core of al qaeda has been seriously weakened, we still face drive from an evolving and fractures that are terrorist groups and indi